What happens to a tadpole after 45 days old?
What happens to a tadpole after 45 days old?
- A) It becomes fully, mouth becomes wider, horny jaw disappears completely
- B) it becomes fully grown, mouth becomes wider, tail disappears completely
- C) it becomes fully grown, mouth becomes wider, external gill disappears completely
- D) it becomes fully grown, mouth becomes wider, slit disappears partially
Correct Answer: B) it becomes fully grown, mouth becomes wider, tail disappears completely
Explanation
This Biology question is asking what happens to a tadpole after it is 45 days old. The options available are A, B, C, and D. Option B is the correct answer. After 45 days, a tadpole undergoes a process called metamorphosis, which is a transformation from its aquatic larval stage to an adult form. During this transformation, the tadpole's body undergoes several changes. The tail disappears completely, and the mouth becomes wider while the external gills disappear entirely. Option A states that the mouth becomes wider, the horny jaw disappears completely, and the tadpole becomes fully grown. However, this is incorrect. Option C states that the external gill disappears completely, the mouth becomes wider, and the tadpole becomes fully grown. This option is partly correct, but it misses the fact that the tail disappears entirely, which is a significant transformation during metamorphosis. Option D states that the tadpole becomes fully grown, the mouth becomes wider, and the slit disappears partially. This option is not correct because there is no such thing as a slit in tadpoles. In summary, after 45 days, a tadpole undergoes metamorphosis, and its tail disappears entirely, while its mouth becomes wider, and its external gills disappear entirely. Option B is the correct answer.